import React, { Component } from "react";
import Child from "./Child";
export default class Parent extends Component {
  state = {
    hasError: "", //用于标识子组件是否产生错误
  };
  // 当Parent的子组件出现错误时，会触发getDerivedStateFromError调用，并携带错误信息
  static getDerivedStateFromError(error) {
    console.log(error);
    return {
      hasError: error,
    };
  }
  componentDidCatch(){
    console.log('此处统计错误次数，反馈给服务器，用于通知编码人员进行bug的解决');
  }
  render() {
    return (
      <div>
        <h2>我是Parent组件</h2>
        {this.state.hasError ? <h2>当前网络不稳定，请稍后再试</h2> : <Child />}
      </div>
    );
  }
}
